src/arch/mips/tlb.cc

   1 /*
   2  * Copyright (c) 2001-2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Gabe Black
  29  */
  30
  31 #include <cstring>
  32
  33 #include "arch/mips/tlb.hh"
  34 #include "params/MipsDTB.hh"
  35 #include "params/MipsITB.hh"
  36
  37 namespace MipsISA {
  38     Fault
  39     TLB::translate(RequestPtr req, ThreadContext *tc, bool)
  40     {
  41         Fault fault = GenericTLB::translate(req, tc);
  42         if (fault != NoFault)
  43             return fault;
  44
  45         typeof(req->getSize()) size = req->getSize();
  46         Addr paddr = req->getPaddr();
  47
  48         if (!isPowerOf2(size))
  49             panic("Invalid request size!\n");
  50         if ((size - 1) & paddr)
  51             return new GenericAlignmentFault(paddr);
  52
  53         return NoFault;
  54     }
  55
  56     void
  57     TlbEntry::serialize(std::ostream &os)
  58     {
  59         SERIALIZE_SCALAR(pageStart);
  60     }
  61
  62     void
  63     TlbEntry::unserialize(Checkpoint *cp, const std::string &section)
  64     {
  65         UNSERIALIZE_SCALAR(pageStart);
  66     }
  67 };
  68
  69 MipsISA::ITB *
  70 MipsITBParams::create()
  71 {
  72     return new MipsISA::ITB(name);
  73 }
  74
  75 MipsISA::DTB *
  76 MipsDTBParams::create()
  77 {
  78     return new MipsISA::DTB(name);
  79 }